North Korea's latest missile test could have been a warmup for a shot on Guam

An unidentified mobile rocket launcher is displayed during a military parade marking the 105th anniversary of the birth of late North Korean leader Kim Il-Sung, in Pyongyang on April 15, 2017. Photo: Ed Jones/ AFP/ Getty Images.

North Korea fired a missile over Japan’sHokkaido province in the early morning hours of Tuesday, and the early figures coming out from the launch indicate it could have been a warm up for similar action toward the US territory of Guam.

North Korea has expressed vitriolic anger over US and South Korean war games throughout the month of August. It culminated in the announcement of a plan to fire missiles toward Guam, where the US keeps nuclear-capable bombers and some 7,000 military personnel.

The launch Tuesday overflew Japan and travelled almost 1,700 miles before crashing down into the sea, hitting a high point of about 340 miles over land. Japan has previously said it would shoot down any missiles headed toward its territory, but this one simply flew over. The missile launch coincides with the completion of Northern Viper, a joint US-Japanese military drill in Hokkaido.

Specifically, North Korea threatened to fire four Hwasong-12 missiles over Japan into the waters just about 20 miles short of Guam.

Experts contacted by Business Insider said it would be unlikely that North Korea could pull off such a feat with a missile that has only been tested once successfully. Furthermore, doubts remain about North Korea’s ability to create a warhead that can survive reentering the Earth’s atmosphere.

But even if the launch ends up having been another missile, or not intended to sure up capabilities headed for a shot toward Guam, the violation of Japan’s sovereign air space will likely demand a response. And US and Japanese policymakers may look to shoot down further tests if they travel the same route.